Hammond Manufacturing 632D Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Hammond Manufacturing 632D is a 16.3mH SCR and Triac Trigger pulse transformer with a 2:1:1 turns ratio, designed for through-hole mounting applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement. The 632D remains available in inventory (854 pcs), but obsolete status necessitates evaluation of active substitute options to ensure long-term supply chain continuity.

Substiute Parts

632D

Hammond ManufacturingIn Stock: 954632D Datasheet

Current PartRFQ

77209C

Murata Power Solutions Inc.In Stock: 92377209C Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 632D is determined by the following critical parameters:

• Inductance: 16.3mH (exact match required)
• Turns Ratio: 2:1:1 (exact match required)
• Transformer Type: SCR and Triac Trigger (Encapsulated)
• Mounting Type: Through Hole
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The Murata Power Solutions Inc. 77209C meets all substitution criteria. Both components share identical inductance, turns ratio, transformer type, and mounting configuration. Dimensional variations (632D: 25.00mm x 20.00mm x 13.00mm max height; 77209C: 25.40mm x 20.30mm x 12.30mm max height) fall within acceptable tolerances for through-hole PCB applications. Both parts maintain equivalent regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

The Murata Power Solutions 77209C is the qualified substitute for the Hammond Manufacturing 632D based on the following factors:

• Electrical equivalence: Identical inductance (16.3mH) and turns ratio (2:1:1) ensure functional compatibility in SCR and Triac trigger applications.
• Regulatory alignment: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and compliance requirements.
• Product status: The 77209C is active production, providing assured long-term availability compared to the obsolete 632D.
• Mechanical compatibility: Through-hole mounting configuration and dimensional proximity support direct PCB layout integration with minimal design modification.

Frequently Asked Questions (FAQ)

Q: Can the 77209C directly replace the 632D in existing designs?

A: Yes. The 77209C meets all critical electrical parameters (16.3mH inductance, 2:1:1 turns ratio) and maintains identical transformer type and mounting configuration. Dimensional differences are minor and compatible with standard through-hole PCB spacing.

Q: What is the significance of the ET (Volt-Time) specification?

A: ET (Volt-Time) of 482VµS is provided for the 77209C but not specified for the 632D. This parameter characterizes transformer core saturation behavior. The 77209C specification provides additional design reference data for applications requiring precise timing or pulse characteristics.

Q: Are there packaging differences between these parts?

A: The 632D packaging is listed as "-" (unspecified), while the 77209C is supplied in Tube packaging. This affects procurement and handling but does not impact electrical or mechanical compatibility.

Q: Why is the 632D classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 77209C, as an active product from Murata Power Solutions, represents the current market equivalent for this transformer specification.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the 632D and 77209C are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.